The following extract is from a Department Of Veterans' Affairs web site (link removed, see update below):

At 5 am on 31 August 1918, supported by artillery, two grossly under strength Australian battalions, charged up Mont St Quentin yelling wildly like a ‘lot of bushrangers’ to disguise their numbers. The cheering platoons at once ran into crowds of Germans, who seemed bewildered and quickly surrendered ...

The Australians charged on and, by the time they reached the main German trench-line, the face of the mount ahead of them was covered with enemy soldiers fleeing over both shoulders of the hill. The Australians swept on, up, and over the summit, routing the German supports and reserves there. ...

On Mont St Quentin, however, the Australians, few in number, were unable to hold their gains and German reserves drove back the scattered troops from the crest. ... But the Australians held on just below the summit and next day it was recaptured and firmly held. ... The taking of Mont St Quentin and Péronne have always been regarded as among the finest feats of the AIF on the Western Front and the intensity of the action is evident from the fact that seven Victoria Crosses were awarded to Australians 1 and 2 September 1918.

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Update 31 July 2024: It has been over 13 years since I first put this photo in my PBase gallery on 21 March 2011. There have been changes in that time. Back then it was an 800 pixel image, since that was still the "large" and default size on PBase. I've upped that to something a bit more modern. PBase is still chugging along, kind of, though with a decreasing number of members. And the web site that I originally referenced in the description ( http://www.ww1westernfront.gov.au/battlefields/mont-st-quentin-peronne-1918.html ) no longer exists. As best I can tell the ww1westernfront.gov.au server was shuttered some time in 2013. By 2019 it was pointing to an "Anzac Portal" page, but by 2024 it's just... dead. The original page, as it was in March 2013, can still be seen in The Wayback Machine, though I can't seem to embed this as an anchor link, so I'll have to give you the raw code:
http://web.archive.org/web/20130325183812 http://www.ww1westernfront.gov.au/battlefields/mont-st-quentin-peronne-1918.html

(Oh great... there isn't supposed to be a space between the slash at the end of the web.archive.org address, and the old address. However PBase at least puts one in anyway. You'd need to enter the full thing as a single string in your browser address bar.)